Understanding Exo-: A Guide to the Prefix's Meaning and Usage

Exo- is a prefix that means "outside of" or "outward." It is often used in scientific and medical terms to indicate something that is located outside of the body or outside of a specific structure.

For example, an exoplanet is a planet that orbits a star outside of our own solar system. An exoskeleton is a skeleton that is external to the body, such as a shell or armor. Exogenous refers to something that is produced outside of the body, such as a hormone or drug.

In general, the prefix exo- is used to indicate something that is external or outside of a specific context, and it is often used in scientific and medical terms to describe structures or processes that are located outside of the body.

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